The biggest problem currently with this piece is the casual tone throughout. Lines like "a dark, hooded, mysterious figure" and "the eyes of it seeming dead and lifeless" would be at home in traditional prose, but SCP documentation is expected to maintain a clinical tone. I would recommend reading http://www.scp-wiki.net/clinical-tone-declassified if you haven't already.

Related to the tone issues, there are also sections of the piece that read like a story about the Foundation being narrated, specifically in later parts of the description section ("The foundation were quick to put two and two together…"). Remember that the conceit of SCPs is that they are internal documents used by the Foundation, and should read as such.

Speaking frankly, it will be difficult selling the concept of "android anime girl who turns into a motorcycle." Most ideas can work, but certain ones require significantly more effort to execute well, and this is one of them. I would recommend running future ideas past the Ideas & Brainstorming section of these forums before you start work on them: http://www.scp-wiki.net/forum/c-89000/help:ideas-and-brainstorming

Even if the concept of the android is that it's been designed to resemble an anime character, it's going to be expected that you present a realistic-looking image (if you decide to use one at all.) You might be able to get away with framing it as concept art of the android, but I would recommend removing it entirely.

standard concrete walled cell roughly two and a half (2.5) metres by three (3) metres.

The number (#) classification was used a lot in the past, but it's really only something that needs to be used when it's critical for numbers to be read accurately (drug prescriptions, for example.) Otherwise it's just taking up space.

For this purpose, a design was chosen to reflect that of a 1.7 metre tall female that looked like they had come straight out of a Japanese animated cartoon (anime).

The "straight out of" phasing is very casual. "Modeled after" is probably closer to what you're looking for.

From the amount of time the android was not seen for, it can be implied that the figure gave the android a conscience and may have hidden something extra in the programming.

I don't think that information can actually be inferred from the time it was missing, especially the "something extra" bit (which itself is overly casual.) Regarding its conscience, I feel like the absence of one had not been raised earlier, so you might have meant sentience or consciousness? Either way, that's something you need to address earlier on for this point to work.

Because no anomalous activites had been seen in the photographs or video clips, the Foundation decided to send in a task force to just observe the android (now designated SCP-XXXX) to see if it had any mallicious intent before moving in to capture it.

"activities," "malicious." I would recommend running your work through a spell check. Some browsers have this functionality included as well. Just as an additional note, an anomalous entity does not need to be malicious for the Foundation to contain it.

(which shall henceforth be noted as SCP-XXXX)

You've already been describing it as SCP-XXXX, so this line isn't really necessary.

and drie away sporting a holographic rider with a female complexing,

"drive," and I assume "complexion." I'd suggest that it might actually be more interesting for the motorcycle to not try and create the illusion of a rider, and would also be more likely to attract the Foundation's notice. As-is, most of this entity consists of significantly more advanced technology than a non-anomalous company would be able to acquire. That might also be something worth exploring.

The foundation were quick to put two and two together, and operation was quickly formed to capture SCP-XXXX before it could do anymore harm with SCP-XXXX-1.

Casual/narration problems again. You also don't specify what -1 is anywhere else in the document. I'm assuming this is the android in motorcycle form, but I would argue that this is confusing since it''s the same entity.

Addendum XXXX-01: Following the subsequent cooperation of SCP-XXXX,

This section seems somewhat pointless within the overall narrative.

A few minutes after the sleep-mode is activated, SCP-XXXX seems to activate, suggesting the sleep-mode has been overridden by a piece of anomolous programming.

"anomalous." I'm also not sure what about that situation suggests that the program is anomalous, so more specificity would help.

Test XXXX-B - Date: 26/02/20██

There's a lot about this test I don't really like. It seems like it's supposed to be a quick wrap-up to the whole piece, but none of the information discovered in it is particularly surprising or new. There's also more conclusions being drawn that I don't personally follow the logic of, as well as information appearing that the Foundation doesn't seem like it would know (most of the analysis section.)

Overall, I think you're going to need to revise a significant portion of this for it to pass muster on the main site. It seems like you have a narrative in mind for the piece, which is good, but it's currently muddled by the problems noted above.

I'd very much like to keep the image showing a visual representation of my SCP, so I'll at least try mentioning the image as being a piece of concept art. I highly doubt that there's any realistic-looking images similar to that one.

The henceforth part mentioning the motorcycle should read SCP-XXXX-1.

Chrome doesn't have a spell-checker so spelling mistakes will inevitably pop up. And if I edited on my phone, it has no autocorrect.

The idea you mentioned about my SCP having more advanced technology than KTM should have, intrigues me very much and could be something I could explore at a later date. And the bike not producing a holographic image is also a good idea. :3

This is my first time writing anything like this, so I'm not used to writing in a clinical tone.

Either way, I'll take the critique into consideration and edit the page accordingly.

If you don't have something with spell-checking functionality, I would strongly recommend using a site like http://www.spellcheck.net/ It's understandable for errors to occur, but readers will expect them to have been corrected by the time you post it to the main site. It's similarly understandable for clinical tone to be difficult when you're just starting to use it, but it will be expected in the finished product.